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Finding the Fourth Proportional to 355.10, 489.96 and 224.28

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Solution

The fourth proportional to 355.10, 489.96 and 224.28 is: 309.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.10 : 489.96 = 224.28 : x
  2. Step 2: Convert to fraction form
    355.10/489.96 = 224.28/x
  3. Step 3: Cross multiply
    355.10x = 489.96 × 224.28
  4. Step 4: Simplify right side
    355.10x = 109,888.23
  5. Step 5: Solve for x
    x = 109,888.23/355.10
  6. Step 6: Final answer
    x = 309.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.